158 lines
1.9 KiB
Markdown
158 lines
1.9 KiB
Markdown
# 문자열
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## String
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```javascript
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let str = new String("Hello");
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```
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```javascript
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charAt()
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charCodeAt()
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codePointAt()
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indexOf()
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lastIndexOf()
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startsWith()
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endsWith()
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includes()
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concat()
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fromCharCode()
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fromCodePoint()
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split()
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slice()
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substring()
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substr()
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match(regexp)
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replace(regexp)
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search(regexp)
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toLowerCae()
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toUpperCase()
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normalize()
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repeat()
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trim()
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```
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## 국제화; Intl
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### DateTimeFormat
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```javascript
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const FORMAT = new Intl.DateTimeFormat("ko-KR", {
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year: "numeric", month: "2-digit", day: "2-digit",
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hour: "2-digit", minute: "2-digit", second: "2-digit",
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timeZoneName: "long"
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});
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let now = new Date();
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console.log(FORMAT.format(now));
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```
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#### 매개변수 옵션
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- dateStyle
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- full
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- long
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- medium
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- short
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- timeStyle
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- full
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- long
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- medium
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- short
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- timeZone
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"UTC", "Asia/Seoul", …
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- hour12
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12시간제 여부. true / false
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- hourCycle
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- h11
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- h12
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- h23
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- h24
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- weekday
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- long
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- short
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- narrow
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- era
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- long
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- short
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- narrow
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- year
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- numeric
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- 2-digit
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- month
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- numeric
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- 2-digit
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- long
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- short
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- narrow
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- day
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- numeric
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- 2-digit
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- hour
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- numeric
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- 2-digit
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- minute
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- numeric
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- 2-digit
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- second
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- numeric
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- 2-digit
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- timeZoneName
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- long
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- short
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### NumberFormat
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```javascript
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let PRICE_FORMAT = new Intl.NumberFormat("ko-KR", {
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style: "currency", currency: "KRW",
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minimumFractionDigits: 2
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});
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console.log(PRICE_FORMAT.format(1000));
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```
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#### 매개변수 옵션
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- style
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- decimal
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- currency
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- percent
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- currency
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"USD", "EUR", KRW", …
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- currencyDisplay
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- symbol
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- code
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- name
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- useGrouping
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천 단위 구분자. true / false
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- minimumIntegerDigits
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- minimumFractionDigits
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- maximumFractionDigits
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- minimumSignificantDigits
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- maximumSignificantDigits |